max 8+4 x 3.5 or 6+4 x 3.5 +2x 2.5 drive bay^^ATX 12x 9.6 / Micro-ATX 9.6 x 9.6 / Mini-ITX 6.7 x 6.7 (When using an ATX motherboard, part of it will be positioned under the PSU, limiting access to some components. The PSU will occupy two PCI slot spaces. )^^2 x120mm + 1 x 80mm fan infront+2 x 60mm fan at rear pre-installed^^Material: Front Bezel+ handel Aluminum^^Main Chassis- Zinc-Coated Steel^^2 x front access USB 3.0 (compatible with USB 2.0 )^^Support Standard ATX PSU with either top or side cooling SFX PSU (using the ATX to SFX bracket with chassis) ^^Support GPU size 128mm (H) x 250mm (L) not remove HDD bracket / 368mm (L) if remove HDD bracket^^3U rack mount chassis depth=420mm / 16.53" not includle handle